title: Removal of arsenic from aqueous solution using pottery granules coated with cyst of Azotobacter and portland cement: characterization, kinetics and modeling.
abstract: A new low cost adsorbents, pottery granules coated with cyst of Azotobacter and portland cement has been developed for aqueous arsenic removal. The developed granule is solid and porous structure forms a stable complex of Fe-Al-Si-O(2) allied with cyst biomass. Batch experiments were revealed that As removal was up to 96% using PGAC beads, whereas 65% by cyst biomass. Immobilization of cyst biomass to pottery granules through portland cement improved the stability of granules and adsorption capacity. Kinetics studies revealed that Langmuir isotherm was followed with a better correlation than the Freundlich isotherm and adsorption was first order diffusion controlled. Presence of Fe-Al-Si-O(2) and polysaccharide complex on the granule surface may be responsible for the adsorption of arsenic and preferentially binds to biomass containing composite than only biomass. Thus, this recently developed cost-effective novel biocomposite, PGAC granule can be used as household level to mitigate the arsenic problem.
authors.affiliation: Central Research Facility, Department of Biotechnology, IIT-Kharagpur, Kharagpur, 721 302 West Bengal, India.
authors.forename: Samiran S
authors.initials: SS
authors.lastname: Gauri
authors.forename: S
authors.initials: S
authors.lastname: Archanaa
authors.forename: Keshab C
authors.initials: KC
authors.lastname: Mondal
authors.forename: Bikas R
authors.initials: BR
authors.lastname: Pati
authors.forename: Santi M
authors.initials: SM
authors.lastname: Mandal
authors.forename: Satyahari
authors.initials: S
authors.lastname: Dey
mesh_terms: D000327:Adsorption; D001151:Arsenic / Q000302:isolation & purification*; D001395:Azotobacter; D002516:Ceramics; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008962:Models, Theoretical; D012996:Solutions; D014867:Water / Q000737:chemistry*
chemical_list: D012996:Solutions; D014867:Water; D001151:Arsenic